Answer:
Residual= -1.5
Step-by-step explanation:
Given : Equation of line y=2.5x-1.5
To find : the residual for the point (4,7)
By definition of a residual is generally a quantity left over at the end of a process.
Now firstly we find the value of f at x=4
f(x) = 2.5x -1.5
f(4) = 2.5(4) -1.5
f(4) = 10 - 1.5
f(4) = 8.5
The residual for the point (4,7) At x=4 f(x)=7
At x=4 f(x)= 8.5
residual= 7-8.5 = -1.5
